★Penny, Louise. The Grey Wolf. Minotaur: St. Martin’s. (Chief Inspector Gamache, Bk. 19). Oct. 2024. 432p. ISBN 9781250328137. $30. M

Numerous phone calls disrupt Armand Gamache’s Sunday morning, but he refuses to pick up. As head of homicide for the Sûreté du Québec, he returns to work on Monday to find the entire department upset about a package that has just been delivered to him. The bomb squad clears it, but the notes and raincoat inside lead to a bigger bombshell for Gamache’s team. The contents of the package then draw Gamache and his team to a small café where, even though he’s surrounded by police, he can’t prevent a murder. Clues left behind by the victim hint at terrorism, compelling Gamache and his closest coworkers to work quietly. He and two trusted officers cross lakes and oceans to stop a terrorist whose target is the country’s infrastructure. VERDICT Penny’s follow-up to A World of Curiosities plays on readers’ fears as she launches a new story arc that is completed in this installment but presents a cliffhanger. It’s a frightening novel of duality, of good versus evil, with an allegorical tale for today’s world, as only Penny can write.